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[USN-2614-1] Linux kernel vulnerabilities

Posted on 20 May 2015
Ubuntu Security

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Ubuntu Security Notice USN-2614-1
May 20, 2015

linux vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

Vincent Tondellier discovered an integer overflow in the Linux kernel's
netfilter connection tracking accounting of loaded extensions. An attacke=
r
on the local area network (LAN) could potential exploit this flaw to caus=
e
a denial of service (system crash of targeted system). (CVE-2014-9715)

Jan Beulich discovered the Xen virtual machine subsystem of the Linux
kernel did not properly restrict access to PCI command registers. A local=

guest user could exploit this flaw to cause a denial of service (host
crash). (CVE-2015-2150)

A privilege escalation was discovered in the fork syscal vi the int80 ent=
ry
on 64 bit kernels with 32 bit emulation support. An unprivileged local
attacker could exploit this flaw to increase their privileges on the
system. (CVE-2015-2830)

A memory corruption issue was discovered in AES decryption when using the=

Intel AES-NI accelerated code path. A remote attacker could exploit this
flaw to cause a denial of service (system crash) or potentially escalate
privileges on Intel base machines with AEC-GCM mode IPSec security
association. (CVE-2015-3331)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
linux-image-3.13.0-53-generic 3.13.0-53.88
linux-image-3.13.0-53-generic-lpae 3.13.0-53.88
linux-image-3.13.0-53-lowlatency 3.13.0-53.88
linux-image-3.13.0-53-powerpc-e500 3.13.0-53.88
linux-image-3.13.0-53-powerpc-e500mc 3.13.0-53.88
linux-image-3.13.0-53-powerpc-smp 3.13.0-53.88
linux-image-3.13.0-53-powerpc64-emb 3.13.0-53.88
linux-image-3.13.0-53-powerpc64-smp 3.13.0-53.88

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic=
,
linux-server, linux-powerpc), a standard system upgrade will automaticall=
y
perform this as well.

References:
http://www.ubuntu.com/usn/usn-2614-1
CVE-2014-9715, CVE-2015-2150, CVE-2015-2830, CVE-2015-3331

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-53.88

 

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